Railway-traffic-controlling system



Aug. 17 1926. 1,596,221

, G. c; WHITNEY RAILWAY TRQFFIC CONTROLLING SYSTEM Original Filed March 5, 1924 Despafcber' hl m g Q R '4 Jo i g M RI {SI 1 L \N 9 //v VE'N 727R CJI Patented Aug. 17, 1326.

twain GILBERT o. WHITNEY, or new roan, n. r.

RAILWAY-TBAFFIC-COBTTROLLING SYSTEM.

Original application filed March 5, 1924, Serial September 3, 1924.

This invention relates to railway traiiic controlling systems in general wherein means are provided for the control of trains by signals and in particular to novel means for controlling said signals by virtue 01": inductively incorporating despatchers control and indication circuit in combination with the lever control of the usual and well known interlocking systems. 7

This present application is adivision o1"- my c-o-pendiug application filed March 5, 1924, Serial No. 697,129, for railway tratlic controlling system.

The accompanying drawing is a View showing one form of railway tratiic controlling apparatus having incorporated therewith one form of control whichcharacterizes my invention.

Referring to the drawing, I have shown an insulated block section comprised of the track rails 6, 7, and incorporated therewith a two-coil track relay 24 and at the other end of the track section a track transformer 9 all of which constitutes one form of alternating current track circuit well known in the art and it is believed that an extended description as to the operation thereof will be unnecessary in view of the fact that it is described at length in my co-pending application Serial No. 697,129, and especially so since no claims of invention are made in respect thereto. In the drawing I have shown a two coil relay 49, one coil of which is continuously energized direct from power wires 16, 17, said power wires receiving energy from alternator 18 as will be appreciated. The circuit of the other coil of this two coil relay49 is via contact 28 on relay 24, when energized, thence via. winding of transformer 34 contact on lever 50 power wire 16 alternator 18 power wire 17 backto the coil as will be appreciated. As shown, both coils of relay 49 are presumed to be energized and with signal Bil-33 clear because the wire circuit therefore is complete but it depends on the impedance of winding 35 whether suit ficient current flows to cause an energized operation of relay 49.I

Owing to the fact that, on some railroads, some of the towers controlling interlocking. signals are closed part of the time it is desirable to arrange a simple means for remotely located despatchers control of interlocking signals and for this purpose my invention consists in providing an induc- 23 or movement of lever No. 697,129. Divided and this application filed Serial No. 735,585.

tive coupling (transform r 34) one winding of which in thecontixl ircuit of relay as previously explained and the other winding 36 is connected to the transmission rircuit 38, to the despatchers quarters wherein have provided transformer 39 with one winding 40 and d'espatchers' multiple point control switch 44. Inductively coupled to winding 40 I have shown winding 42 and the current inducted therein energizes indicator lamp 45. I have also prof aled resistance 46 as a means of varying 'istance ot the transmission circuit 87,

orovided for making a complete break the same circuit. v I

.rrs shown winding 35 is of low impedance, relatively speaking, because despatchers control circuit is on closed (relatively low impedance) circuit. On this basis and with Contact on lever 50, track relay contact 28, and contact on relay 49 closed, signal 32.33 shows tl e proceed indication. It is ob-. vious, that the opening of track relay contact 50 to the dotted position will cause signal 32-33 to display the stop indication. To provide despatchers control of signal 3233 the despatcher moves switch 44 out of engagement as shown and into position to contact'47-this inserts resistance 46 into the transmission circuit included with wires 37, 38, and less current flows therein resulting in lower induced current supply to lamp 45. As a result of increasing the resistance of the transmission. circuit the impedance of winding 36 is increased which automatically is reflected in increased impedance in winding 35 and, as this winding is in series in the circuit supplying current to one coil of relay 49 a lowered current supply is etlected and the relay opens with consequent change in the display of indication of signal 3233. Attention is directed to the fact that with the restoration of the despatchers switch 44 to its former position the conditions surrounding the control of signal 32-33 will be restored to their former condition. It will also be noted that the behavior of indicator lamp 45 is an indication of what is taking place in the circuit which includes winding 35.

Obviously, the various types of signal circuits may be employed in combination with my invention by making the obvious appropriate changes well known to any one skilled.

ill

in this art and I desire to have it understood, therefore, that the arrangement and illustra tion which I have shown and described is merely illustrative and does not exhaust the various ei'nbodiments and forms which my invention may take in practice.

Having thus described my invention I claim and desire to secure by Letters fratent-:--

1. A circuit controlled by the wheels of a train and by a lever and by a circuit including an indicating element and a switch, said second circuit inductively coupled to said first circuit, said switch controlling said first circuit.

2. A circuit controlled by the wheels of a train and by a lever, a second circuit including an indicating element and a switch, said second circuit inductively cou pled to said first circuit, said indicating element indicating the condition of said first circuit independent of said lever.

3. A circuit controlled by the wheels of a train and by a lever, a second circuit including an indicating element a switch and at times a resistive element, said second circuit inductively coupled to said first circuit, said indicating element controlled by said wheels, by said lever, and by said switch.

4. A circuit cont-rolled by the wheels of a train and by a lever, a second circuit including an indicating element a switch and at times a resistive element, said second circuit inductively coupled to said first circuit,

said switch and resistive element controlling the current flow in said first circuit.

5. In a railway trai'iic controlling system, an alternating current track circuit including a track relay and a source of energy, a second relay controlled by said track relay and by a lever, said second relay controlling an automaticsignal and system, a circuit inductively coupled to the control circuit 0t said second relay, said last mentioned circuit including a switch an indicator and at times a resistive element for decreasing the energy supply to said second relay independent of said track relay and independent of said lever, said track relay controlled by a train on said track circuit.

6. In a railway traiiic controlling system, an alternating currenttracl: circuit including a track relay and a source of energy, a second relay controlled by said track relay, said second relay controlling an automatic signal and system, a circuit inductively coupled to the control circuit of said second relay, said last mentioned circuit including a switch an indicator and at times a resistive element for governing the supply of energy to said second relay when said track relay is closed, said indicator indicating the condition of the last mentioned circuit.

Signed at New York in the county of New York and State of New York this 2nd day of September A. D. 1924.

GILBERT C. VHITNEY. 

